Dell Emulex Family of Adapters - Manual (Page 692)

Emulex Drivers for Windows User Manual P010077-01A Rev. A
4. Troubleshooting
Troubleshooting the iSCSI Driver
692
A login to new target fails after
Microsoft iSCSI Initiator Service is
installed. When Microsoft iSCSI software is installed, the service chooses a
default IQN name for the UCNA. The Microsoft iSCSI service
issues the request to the iSCSI driver via the WMI interface to set
this new IQN name. Therefore, any IQN name that was
configured earlier (such as by using iSCSISelect) will be
overridden and the new IQN name will be in effect.
Although this will not affect existing boot sessions and persistent
sessions, new target logins could fail because the new IQN name
does not match the incoming IQN name configured on the target.
After the Microsoft iSCSI Initiator Service is installed, the
initiator name must be renamed to the previous name configured
from the WMI GUI.
When software-based iSCSI targets
are logged into the UCNA, Event ID
56 (Driver SCSI (000000)). Appears in
the Windows event viewer. This issue
has been observed on Windows
Server 2008 R2 under the following
conditions:
• The iSCSI target is a
software-based target (MSiSCSI,
IET, StarWind) that uses a local
hard drive or a RAM disk for its
backend LUN.
• Different UCNA ports are involved
in the login.
• A SAS controller is present on the
system.
This occurs caused because of an issue with the data reported by
the iSCSI target in the Product Identification field in response to
the standard inquiry from the UCNA. This field should be unique
among different targets' LUNs, but software-based targets report
the same pre-formatted data for all the LUNs across all targets.
When Windows encounters the same Product Identification field
for different LUNs with the same Bus Target Lun field, it records
error in the event log. No other effect has been found as a result
of this behavior.
The workaround for this error is to use non-overlapping LUN
numbers for the various LUNs across the various iSCSI targets. On
the iSCSI target system, LUNs can be numbered sequentially;
they do not have to start at zero.
Table 4-6 Troubleshooting the iSCSI Driver (Continued)
Issue Answer/Solution